Apparatus for making cores for watch-crowns



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f A. C. DALZBLL.

- APPARATUS POR MAKING GORBS POR WATGHGROWNS.

No. 329,284. Patented'Oot. A27, 18885.

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2 Sheets-#Sheet 2..

('No Model.)

A. C. DALZBLL. APPARATUS PoR MAKING GORES POR WATGH GROWNS.

No. 329,284. Patented Oct. 27, 1885.

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UNITED STATES PATENT OEEFE.

ALLAN C. DALZELL, OF NEWPORT, KENTUCKY.

APPARATUS FOR MAKING CORES FOR WATCH-CROWNS.

SPECIFICATION forming part of Letters Patent No. 329.284, dated OctoberApplication iilcd April 15, 1885.

To a/ZZ whom, it may concern.-

. Beit known that I, ALLAN C. DALZELL, of the city of Newport, county ofCampbell, and State of Kentucky, have invented certain new and usefulImprovements in Apparatus for Making Cores for Watch-Crowns, of whichthe following is a specification.

This invention relates to the apparatus for making corrugatedarticles-such as watchcrown cores-from solid metallic blanks.

In the manufacture of cores for watchcrowns as heretofore practiced,much diffi- -culty has been experienced in corrugating or ridging thehead, the corrugations being as a rule formed by milling, thehead beingeither turned or rolled into shape. Where the corrugations were formedinthe head ofthe core by milling, it was impossible to provide a stem orcollar integral with the head and extending beyond the periphery orbaseof the said head,as the milling tool or cutter, in cutting the radialcorrugations or ribs upon the under side of the head, would beobstructed thereby, and prevented from cutting the corrugations toapoint flush with said stem,which is absolutely necessary to the perfecttting of the corrugated crown cap or shell, which is subsequently drawnover and fitted to the core-head. In most instances lthe core has beenmade spherical and corrugated, after which it was tapped,77 and a stem,or what is commonly known as a core-washer,7

screwed therein. p

The purpose of and reasons for corrugating or r1bb1ngthe cores ofwatch-crowns is obvious tothose skilled in the art, and therefore anexplanation is unnecessary.

The object of this invention'is, primarily, to upset a solid wire blankby means of dies having suitable matrix, to form thereby a watchcrowncore having a head corrugatd on itsi under side, a'stem,'a teat orprojection -at .the apex ofthehead, and a? central cavity in the base ofthe stem, said cavity enabling the core to be centered during theoperation of tapping it for the reception of the key-pipe`; anotherobject of the invention being to form screwthreads upon the stern (orcore-washer) by upsetting the metal blank spirally at its lower endsimultaneously with the operation of upsetting the blank at its upperend to form the corrugated head, as will be hereinafter clearly 27,leas.

Serial No. 162,294. (No model.)

pointed out. This last operation of screwthreadingthe stem orcore-washer is only neces sary with crown-cores used with key-windingwatches, or with watches having stationary crowns,which crowns areusually screwed into the pendant, and are provided with push-pinsextending out through their centers.

My invention consists incertain details ofconstruction of diesandapparatus to form watch-crown cores from metallic blanks.

Figure 1 represents in side elevation, partially in longitudinalsection, a set of dies for forming watch-crown cores from wire blanksconstructed in accordance with my invention,

these dies forming a core with corrugations on the under side of itshead, denting centrally the stein of the core and forming a teat at theapex of the head, said iigure showing the blank in position to bestruck, the guiding-collar down and the upper die elevated; Fig. 2, -aplan view of the lower dies below the dotted line x Fig. 1; Fig. 3, apartial longitudinal section of the dies, showing the blank as struckand formed into a crown-core; Figs. v

et and 5, an enlarged side and plan view, respectively, of the metallicblank from which the core is formed; Figs. 6 and 7, an elevation andunder side view, respectively,of the coreblankl after being operatedupon by the dies, said figure showing a core with corrugationsI on itsunder side; Fig. 8, an underside view of the upper die and itsguiding-collar; Fig. 9, a side elevation, )artially in seotion,of a setof dies for forming crown-cores from solid blanks and screw-threadingtheir stems, the blank being in position to be operated upon; Fig. 10, aplan view of the screw-threaded lower die, the said die being in twohalves;

Fig. 11, a side elevation of the same; Fig. v12,

a longitudinal section of a portion of the dies represented in Fig. 9,the core-blank being shown as pressed into shape; Fig. 13, an enlargedview of a screw-threaded watch-crown core formed from a solid blank bythe dies represented in Figs. 9, 10, 11, and 12.

The dies and auxiliaries for forming a crowncore from a solid metallicblank are used with a double-acting press of any ordinary or improvedpattern. The dies consist of the upper die or half, A, the lower'die orhalf, B, and the male center die, C. The upper die,A, works inand isguided in its' movement bya IOO 5 blank.

the said die and its collar being the die-holders or plunger of thepress in the usual manner. The upper die, A, is provided with a matrix,a, at its lower end, said matrix being semi-spherical in shape, orsubstantially so, with smooth surfaces, and a central cavity, a', havingpreferably a plane face or bottom, which matrix forms the upper half ofthe crown core-head H and its teat or projection h. The lower die, B,constructed of hardened or chilled steel, is seated in asteel die-box,D, and is provided at its upper central face with a matrix, b,corresponding to the under face, H', of the core-head to be formed, vsaid matrix having a seri es of radially-extend ed grooves and ridges orcorrugations. b', and having a central opening, b2, communicating withthe same, said central opening being of a length and of a diameter equalto the lengt-h and diameter of the core washer or stem H2 of the coreGwhen finished or pressed into shape. By reference to the drawings itwill be noticed that the central opening, b2, extends from the matrix bentirely through the die B, and that the die C is inserted in the samefrom below, which die C is provided with a central projection, c, at itsupper end, to form the cavity H3 in the core as it is pressed intoshape. `It is obvious that the lower die, B, might have a projectionformed as a part thereof, instead of extending the central opening, bz,entirely through the die and inserting the die C, having the projectionthereon; but itis preferable to form the lower die, B, and the die G intwo pieces, inasmuch as should one or the other become injured theycould be replaced with less inconvenience. As shown, the die C istapered and extends through the steel die-box D, where it is held inplace from longitudinal displacement by means of a screw, E, extendedthrough the base-pieceF and screwed into the die C, said screw holdingthe die-box and die C securely against movement. The lower die, B, isprovided with an annulus or downwardly-projecting flange, b, which hasits collar, B', connected to bearing in an annular groove formed in theface of the die-box D. The upper face of the lower die, B, is stepped77or rabbeted, as shown at d d', to form guiding-faces for the collar Band the upper die, A. The bearings thus afforded by the sides of therabbets d d not only align the collar B with relation to the lower die,but insure accuracy of movement of the upper die, A, when4 operatingupon a With the aid of such guides-viz., rabbets d d-the upper die, A,is bound to maintain the same relation with the lower die, B, whenupsetting a blank to form acore, and there is no possibility ofmisshaping a blank by striking it out of line.

I do not desire to limit myself to the special construction ofwatch-crown cores illustrated in Figs. 6 and 7 of Sheet 1; neither do Idesire to limit myself to the exact construction of dies shown in Figs.1, 2, and 3as, for instance, the matrix b might have a screwthreadedcentral opening, e, as shown in Fig.

9, Sheet 2, and thc lower die having Said matrix b might be constructedin two halves. as shown iiFigs. ldand 11, in which case said die wouldbe tapered and seated in a tapered opening in the die'box, which die-boxwould be, provided with springs f, upward aftery the core had that saidcore might be removed. In either case the die B would be made removablefrom the die-box D, so that the core after being formed might be drivenout of the'matrix in case it became fastened.

The operation of forming the core is as follows, viz: The blank g, ofsuitable l'engthand diameter, is placed vertically in the centralopening, b2, of the lower die, B,which opening corresponds in diameterto the diameter of the blank and supports the same in a verticalposition. The upper die, A, and sleeve B are then allowed to descend,the sleeve B coming in contact with the die B before the upper die, A,strikes the metallic blank, the sleeve entering the rabbet d, and thusholding the die B from lateral movement, after which the die A strikesthe upper end of the blank, upsetting the same at its upper en'd intothe matrix of both the upper and lower dies, the core-head to the exactshape of the matrix of the lower die,(which is corrugated radially, asbefore described) and to the shape of the upper matrix, which isprovided with a cavity, a', as shown, forming the stem or core washerintegral with the said head, and forming a cavity in the lower end ofsaid stem central therewith. By this operation it will be seen that thecore-head is corrugated or ridged upon its under side from a point flushwith the periphery of the stem to a point central to the depth ordiameter of the head. It is necessary to extend these corrugations overthe upper side of the core-head or past the center, which will be doneby means of cutting-dies or dies having cutting-edges, which dies andthe process of projecting the corrugations past the center of the headwill form the subjectmatter of aseparatc application, marked Case B,7signed April 1, 1885. The upper die, A, might be provided with acorrugated matrix to form corrugations upon the upper side of thecore-head; but the results are not satisfactory when pressing the blank,as the corrugations tend to leave a seam around the head centrally,where they meet the corrugations formed by the matrix of the lower die,B.

Vhen the dies illustrated in Fig. 9 are used, the operation of formingthe blank into a core is similar to that with dies shown in-Fig. 1, themetal of the blank being upset spirally atits lower end into thescrew-threads of the stemforming opening, to form screw-threads upon thestem of the core, the die B being removed from the die-box to extractthe screw-threaded core. 4 y Many different articles might be formedwith dies similar to these described with but slight changes therein.For instance, by forming the matrix of the lower die with teeth insteadof gi/mailman;

een formed, so

thus forming ros IIO

a patentable invention, I would reserve the `right to make such methodthe subject-matter of a separate application.

1. In an apparatus for forming watch-crown cores and similar articlesfrom solid metallic blanks, the combination, with the upper die, A,having a matrix preferably semi-spherical in shape, with a centralcavity, of the lower die,B,having a corrugated matrix and a centralopening, and the die C, projected into said opening, all substantiallyas and for the purpose described. v

2. In an apparatus for forming watch-crown cores and similar articlesfrom solid metallic blanks, the die B, seated in the die-box D, andhaving a semi-spherical (or nearly so) matrix provided with radiatingcorrugations and a central opening, said die B being rabbeted upon itsupper face to form guides for the upper die, A, and its collar B', incombinationvwith the upper die, A, provided witha semi-spherical matrixhaving a central cavity, and its collar B' having a shouldered end tofit n :9; 3 as the rabbet of the lower die, said collar B forming aguide for the upper die and centering it with relation to the blank tobe operated upon, substantially as described.

3. The combination, in an apparatus for forming watch-crown cores afdsimilar articles from solid metallic blanks. of a lower die constructedin two halves, hav` ng a corrugated matrix with a central screw-threadedopening communicating therewith,said die being seated in a die-box,which die-box is provided with springs to bear against the under side ofthe lower die, said die being tapered, an upper die having a matrix anda collar to guide and direct the movement of the upper die duringoperation, said dies forming a round metallic blank into a core with ahead and stem integral with one another,

corrugating the under side of the headand screw-threading the stem,substantially as described.

4:. In an apparatus for forming watch-crown cores from solid metallicblanks, the lower die, B, having a corrugated matrix and a centralstem-forming opening, the vdie C, projected into said opening Y. from:the under side and having a tapered body, in'combination with thedie-box D, upper die,A,having a matrix, and the collar B', to guide theupper die, all constructed andarranged substantially as sh own anddescribed.

In witness whereof hand and seal, at Newport, Kentucky, 1st day ofApril, A. D. 1885.

ALLAN C. DALZELL. [L. s]

Witnesses: 1

N. E. C. WHITNEY, T. l?. CARo'rHERs.

I have hereunto set my this

